Influence of the cementitious paste composition on the E-modulus and heat of hydration evolutions

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Lino Maia (Autor) FEUP; Miguel Azenha (Autor) Outra; Rui Faria (Autor) FEUP; Joaquim Figueiras (Autor) FEUP

Revista

Título: Cement and Concrete Research

Vol. 41

Páginas: 799-807

ISSN: 0008-8846

Editora: Elsevier

Indexação

ISI Web of Knowledge - 19 Citações

ISI Web of Science

Scopus - 24 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

Outras Informações

ID Authenticus: P-002-PGF

DOI: 10.1016/j.cemconres.2011.03.008

Abstract (EN): E-modulus and heat of hydration are features of cement-based materials that follow a rapid rate of change at early ages. This paper analyses the influence of the composition of cementitious pastes on these features by using two methods: (i) a novel technique for continuously monitoring the E-modulus of cement-based materials, based on evaluating the first resonant frequency of a composite beam containing the material under testing, and (ii) an isothermal calorimeter to determine the released heat of hydration. Seventeen mixes are tested, encompassing pastes with five w/c ratios, as well as different contents of limestone filler, fly ash, silica fume and metakaolin. The results permit the comparison of the E-modulus and heat of hydration sensitivities to mix composition changes, and to check possible relations between these features. This work also helps to establish the technique (i) as a non-destructive method for monitoring the E-modulus evolution in cement-based materials since casting.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9